/*
   Copyright (c) 2011 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-05 Marco Riccardi - initial implementation
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLElement;

public abstract class Number extends GeneralPolynomial {

    private enum MySubclass { RationalNr, ComplexNr,}

    public static boolean isNumber(String className){
        boolean found = false;
        for (MySubclass mySubclass :MySubclass.values()){
            if (mySubclass.name().equals(className)){
                found = true;
                break;
            }
        }
        return found;
    }

    public static Number newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        XMLElement xmlElement = xmlElementList.peek();
        if (!isNumber(xmlElement.getName())){
            throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a subclass of Number", xmlElementList);
        }
        MySubclass mySubclass = MySubclass.valueOf(xmlElement.getName());
        switch (mySubclass) {
        case RationalNr: return RationalNr.newInstance(parentNode, xmlElementList);
        case ComplexNr: return ComplexNr.newInstance(parentNode, xmlElementList);
        default: throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a subclass of Number", xmlElementList);
        }
    }

        public LinkedList<XMLElement> getXMLElementList() {
            if (this instanceof RationalNr) {
                return ((RationalNr) this).getXMLElementList();
            } else 
            if (this instanceof ComplexNr) {
                return ((ComplexNr) this).getXMLElementList();
            } else 
            return new LinkedList<XMLElement>();
        }
}
